Question

3x-y para x=2 e y = -2
x-y²

Answer 1

$3x - y \\ \\ x = 2 \\ \\ y = -2x - y^2 \\ \\ 3 * 2 -(-2x - y^2) \\ \\ 6 + 2x - y^2 \\ \\ => 2x - y^2 + 6 \\ \\ ou \\ \\ -y^2 + 2x + 6$

Answer 2

3x-y
3•2-(-2)
6+2=8


x-y²
2-(-2)²
2-4=-2